(cosxtanx-tanx+2cosx-2)/tanx+2=cosx -1 can someone show me how to prove this?

See detail below.

Step-by-step explanation:

A word of caution before getting to the actual problem: I believe there is an important set of brackets missing in the original post. The expression on the left hand side should be:

(cosxtanx-tanx+2cosx-2)/(tanx+2)

Without the brackets, it is left unclear whether the denominator is just tanx or tanx+2. I recommend to use brackets wherever any doubt could arise.

Now to the actual problem: \we can make the following transformations on the left hand side:

which is shown to be the same as the right hand side, which was to be shown.

step-by-step explanation:

on the middle line

step-by-step explanation:

1/5=50